> Restore from iCloud when you're safely out of the airport.

"Sir, your phone appears to have been reset. Please connect it to iCloud and sync now".

If they can compel access to apps and social media why would iCloud et al be any different?

Keep a separate sparse iCloud account if you don't think you have the soft skills to work around that unlikely scenario.

Will it stay unlikely in the long term?

Who knows. You won't like my advice though: leave the country if the surveillance state reaches a crescendo.

As a tech worker, I'm employable anywhere in the world, and can have my family and all of our belongings out of the country in 12 hours. My heart goes out to everyone who doesn't have such flexibility. It's not fair to those impacted that these are the times we live in.

That's not to say we give up. We try to fix this fuckery until the very end.